This is my go to primer.
I have adult acne with active breakouts so I'm greasy, but my treatments tend to make me look dry tired and dehydrated.
I used this before my acne developed and loved it!
I wasn't expecting a miracle, I know that I'm not going to be lump free. (My skin is lumpy no matter how good the coverage etc is of my makeup. You can't hide that stuff!)
After your moisturiser has soaked in, Use a pea sized amount, apply all over face and allow to soak in. I apply my DW foundation using a beauty blender (I wash with antibacterial soap every day) as it's the only thing I find I can build coverage with.
However... Where my make up usually goes dry, peels off or sinks into my pores. (Other battles as well as covering zits!) this prevented all that. It kept the skin around the top of my cheeks and my chin looking fresh rather than crispy.
Pros-
It works for me. I don't think it's expensive as you don't need a lot.
My foundation lasts longer whilst looking fresher. I look less dehydrated.
Cons-
Pump dispenser. This is hygienic. But you end up with a lot of product left in the tube.

I have acne scarring with some pitted scars on my cheeks, so I like using primers to fill the void and smooth the texture of my skin. I purchased at MAC with some other facial/skincare products. Although this is a great product, it is not for my oily skin. I live in a hot, humid climate and I am only able to use this product when I know I won't be wearing makeup for long periods of time or on vacation in a less humid climate. The shimmery lotion texture feels nice (not slimy like most primers) but it does make makeup slide off if you are oily.

This markets itself as both a primer and a finishing spray. I guess it's nice to cut back on having to buy 2 different products but I've used much better primers that feel silkier. However by spraying my face after I've applied the rest of my makeup, it makes it last the whole day. I would buy again just for the staying power.

This is the first primer I have ever owned and I think that it does a really great job! I used to wear it over moisturiser but have found that makes my skin too oily. A little of this product goes a long way. It lasts a long time so therefore I think the price is good value. I would recommend this product to most people, unless you have extremely oily skin!

It'a a nice primer. It prolongues the wear of your makeup. but it doesn't do anytjing by itself. It has some shimmer to it and feela like a lotion, I feel like it doesn't do anything with pores or linea at all, and a pump of this wastes sooo much. I thibk there are so many better primers out there.

I bought this a number of years ago and it's still in my makeup box. I have oily skin and this seems to make it more oily if left on all day. With it being Mac I thought it would be better and make my skin look nicer! But it really is a basic primer! A glow to it would have been nice or if it matted your skin. I personally think any high street primer can achieve what this primer does.

Just a short review - I actually felt this made my makeup last SHORTER. Also, it felt heavy on my skin all day. I could feel my makeup all day whereas normally I don't. I had some flakiness one morning and it didn't help with that at all. I'm not even going to finish the bottle. I am just going to back to MAC it. If I had a receipt I would return it with no shame at all. Oh, I don't at all notice the glitter that others are describing.